They expected Shanks to be the Itachi of Piss Piece. @SakazOuki

Kishi would've had teen Itachi put buffed Harald into a Genjutsu and somehow Imu starts tweaking in fear admitting Itachi was stronger than him.

Kishi would've had teen Itachi put buffed Harald into a Genjutsu and somehow Imu starts tweaking in fear admitting Itachi was stronger than him.
People just overestimated Orochimaru